package com.atguigu.gulimall.ware.listener;

import com.atguigu.common.to.OrderTo;
import com.atguigu.common.to.mq.StockLockedTo;
import com.atguigu.gulimall.ware.service.WareSkuService;
import com.rabbitmq.client.Channel;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.IOException;

/**
 * 库存解锁监听
 *
 * @desc
 * 库存锁定成功发送消息到延时队列 stock.locked(路由key)，超时TTL，消息进入私信路由，然后转发到解锁库存的队列。
 *
 * @author: kaiyi
 * @create: 2020-09-16 19:01
 */
@Slf4j
@RabbitListener(queues = "stock.release.stock.queue")
@Service
public class StockReleaseListener {

  @Autowired
  private WareSkuService wareSkuService;

  /**
   * 1、库存自动解锁
   *  下订单成功，库存锁定成功，接下来的业务调用失败，导致订单回滚。之前锁定的库存就要自动解锁
   *
   *  2、订单失败
   *      库存锁定失败
   *
   *   只要解锁库存的消息失败，一定要告诉服务解锁失败
   */
  @RabbitHandler
  public void handleStockLockedRelease(StockLockedTo to, Message message, Channel channel) throws IOException {
    log.info("******收到解锁库存的信息******");
    try {

      //当前消息是否被第二次及以后（重新）派发过来了
      // Boolean redelivered = message.getMessageProperties().getRedelivered();

      //解锁库存
      wareSkuService.unlockStock(to);
      // 手动删除消息
      channel.basicAck(message.getMessageProperties().getDeliveryTag(),false);
    } catch (Exception e) {
      // 解锁失败 将消息重新放回队列，让别人消费
      channel.basicReject(message.getMessageProperties().getDeliveryTag(),true);
    }
  }

  /**
   * 订单关单库存释放
   *
   * @param orderTo
   * @param message
   * @param channel
   * @throws IOException
   */
  @RabbitHandler
  public void handleOrderCloseRelease(OrderTo orderTo, Message message, Channel channel) throws IOException {

    log.info("******收到订单关闭，准备解锁库存的信息******");

    try {
      wareSkuService.unlockStock(orderTo);

      // 手动删除消息
      channel.basicAck(message.getMessageProperties().getDeliveryTag(),false);
    } catch (Exception e) {
      // 解锁失败 将消息重新放回队列，让别人消费
      channel.basicReject(message.getMessageProperties().getDeliveryTag(),true);
    }
  }

}
